freeroam: Fix Validation for setElementPosition RPC Function (#619)

* Fixes 'Something went wrong.' when teleporting to interior through F1 panel
* freeroam: Fix Validation for setElementPosition RPC Function

Author: trailbl4zer

[gameplay]/freeroam/fr_client.lua

@@ -134,6 +134,10 @@ local function setElementPosition(element,x,y,z)
 		setTimer(resetKnifing,5000,1)
 	end
 
+	x = tonumber(x)
+	y = tonumber(y)
+	z = tonumber(z)
+	
 	server.setElementPosition(element, x, y, z)
 end